Ernest, it isn't small fry at all. What you are going through is just as big to you as what others are going through is to them. I can understand how you feel. You are most likely feeling very vulnerable at the moment and, you are seeking a little reassurance from DH that all is going to be ok, that he isn;t going to leave etc. What with the anniversarys and everthing, its no surprise ou feel like this.
I can also see where DH is coming from (not that I agree with him)He is wanting to move on, move forward. He feels ashamed of his behaviour and just wants to be allowed to forget it. Of course he does, what man would want to be constantly reminded of the pain he caused. These poor, poor men
It's a shame he cannot see that it is he who has caused your insecurity. That it is his affair that is the reason for it and, with just a little reassurance you would feel a lot better. I'm afraid that once again we have a man thinking only of himself. He is not seeing this from your point of view he is only thinking of the shame he feels when you remind him of it and he just wants you not to mention it.
Like you say, if you do keep asking for reassurance it will only serve to make him angry, say things he does not mean and cause problems that you can do without. We need to put a more positve slant on this, find reassurance in how he behaves when he is with you, the nice things he says to you, how he treats you, how much effort he has made to win your trust etc.
At the moment you are worrying about things that might never happen, the 'what if's' are spoiling the here and now. My advice would be, to try and get into a positve frame of mind, don't sit thinking, over thinking, try not to think the worst.
If you need reassurance and a bit of jollying along, come on here and let us do it for you.
Baffy, those books are The Rules of Life by Richard Templar as recommended by HW and, Getting Through To The Man You Love (the no nonsense, no nagging guide or women) by Michele Weiner-Davis, as reccommended by TFM! Brilliant book, you get what you want in a very clever way